A FALLEN FIREFIGHTER WITH POWERFUL TIES TO THE MARATHON SURVIVORS. MIKE KENNEDY VERY MUCH IN PEOPLE'S MINDS TONIGHT. HE RACED FROM HIS BOYLSTON STREET FIREHOUSE TO THE MARATHON FINISH LINE AFTER THE BOMBS EXPLODED. TODAY OUR JACK HARPER TALKED TO KENNEDY'S DAD ABOUT THE ROLE OF A TRUE HERO IN THE FACE OF TRAGEDY. JACK IS LIVE IN BOSTON RIGHT NOW. JACK? KIND OF A DOUBLE WHAMMY FOR PAUL AT THIS POINT. HE SAYS, OF COURSE, HIS SON DID GO DOWN THE STREET TO TAKE CARE OF MARATHON VICTIMS AND HE WAS GOING TO RUN THE MARATHON A WEEK FROM TODAY. MR. KENNEDY SAID THE LITTLE THINGS NOW SEEM HUGE. A CUP OF COFFEE WITH YOUR SON I TOOK FOR GRANTED FOR SO LONG. HIS SON MICHAEL KENNEDY ONE OF THE FIREFIGHTERS KILLED IN THE BEACON STREET FIRE. A YEAR AGO TOMORROW HE WAS ON DUTY ON BOYLSTON. WHAT HE EXPERIENCED THAT DAY WAS SIMILAR TO WHAT HE EXPERIENCED IN IRAQ AS FAR AS DEALING WITH THE WOUNDED AND INJURED. WEARING A FUND RAISING SHIRT CARRYING HIS SON'S NICKNAME, DORK, PAUL REMEMBERS WONDERFUL TIMES WITH HIS ONLY SON INCLUDING MIKE'S FIRST BOSTON MARATHON. I WAS CLOSE TO THE FINISH LINE AND I SAW HIM CHUGGING ALONG AND I WAS ABLE TO GO LIKE THIS AND CATCH HIS ATTENTION. AND HE SAW ME. I WAS RIGHT OUTSIDE THE LENNOX HOTEL. AND HE STOPPED RUNNING AND HE CAME AROUND TURNED BACK AND THREW HIS ARMS AROUND ME. HE WAS WITHIN SIGHT OF THE FINISH LINE AND GI GAVE ME A HUG. THERE ARE A SERIES OF DATES COMING UP THAT I WILL HAVE DIFFICULTY WITH. IN JUNE, BIRTHDAYS. HOLIDAYS. THEY ARE ALL GOING TO BE DIFFERENT TO ME NOW. I DON'T REALLY KNOW HOW TO DEAL WITH IT. IT IS JUST ONE DAY AT A TIME. ONE MINUTE AT A TIME. ONE SECOND AT A TIME. HOW I DEAL WITH IT THAT DAY, I DON'T KNOW YET. I REALLY DON'T KNOW YET. AND, OF COURSE, TOMORROW IS THAT FIRST DAY AND THEN NEXT MONDAY AGAIN IT IS A TOUGH TIME FOR THOUSANDS OF PEOPLE AND PAUL

Lawyers for Boston Marathon bomber Dzkokhar Tsarnaev rested their case in his federal death penalty trial Tuesday after presenting a brief case aimed at showing his late older brother was the mastermind of the 2013 terror attack.